EDP Sciences logo
Subscriber Authentication Point
Search
Menu
Home All issues Volume 633 (January 2020) A&A, 633 (2020) A8 Full HTML
Free Access

Table A.1

Information on the exothermic reactions considered in this study that potentially produce escaping N(4S), N(2D), 3CH2, CH3, NH, CH4, NH3, C2H2, C2H3, HCN, C2H4, N2, C2H5, and C2H6 in Titan’s dayside upper atmosphere.

No. Reaction ΔE k Φesc References
(eV) (cm3 s−1) (s−1)
Ra 1/Rj 2 N(2D) + N2 → N(4S) + N2 1.58 1.70 × 10−14 6.43 × 1023 0.708 1
Ra 2/Re 7 NH + CH3 → N(4S) + CH4 0.67 1.00 × 10−11 1.03 × 1023 0.113 20
Ra 3 N+ + CH4 → N(4S) + CH 1.08 5.00 × 10−11 5.34 × 1021 5.88 × 10−3 2, 10
Ra 4 N+ + HCN → N(4S) + HCN+ 0.62 2.40 × 10−9 8.68 × 1020 9.56 × 10−4 3
Ra 5 N + e → N(4S) + N(2D) 1.73 2.26 × 1022 0.025 4, 5
Ra 6 N + e → 2 N(2D) 0.53 5.94 × 1021 6.54 × 10−4 4, 5
Ra 7 CN+ + e → N(4S) + C 3.39 2.71 × 1017 2.99 × 10−7 6
Ra 8 CN+ + e → N(2D) + C 2.11 2.88 × 1018 3.17 × 10−6 6
Ra 9/Rc 8 N2H+ + e → N(4S) + NH 1.11 8.53 × 1020 9.38 × 10−4 7
Ra 10 CNC+ + e → N(4S) + C2 2.03 7.30 × 1019 8.04 × 10−5 7
3CH2
Rb 1 H2 + C + M → 3CH2 + M 2.26 k0 = 2.50 × 10−28 4.60 × 1018 1.07 × 10−5 8, 9
k∞ = 1.41 × 10−11
kR = 6.00 × 10−16
Fc = 0.40
Rb 2 N+ + C2H4 → 3CH2 + HCNH+ 4.13 1.58 × 10−10 6.31 × 1019 1.47 × 10−4 10
Rb 3 C2H + e → 3CH2 + CH 0.67 4.70 × 1019 1.10 × 10−4 11
Rb 4 C2H + e → 2 3CH2 1.52 2.15 × 1021 5.02 × 10−3 12
Rb 5/Rd 29 C2H + e → 3CH2 + CH3 2.02 1.51 × 1022 0.035 13, 14
Rb 6/Re 20 C2H + e → 3CH2 + CH4 3.98 3.55 × 1013 8.27 × 10−12 15, 16
Rb 7/Rg 22 C3H + e → 3CH2 + C2H2 3.89 6.51 × 1019 1.52 × 10−4 17
Rb 8/Ri 5 C3H + e → 3CH2 + C2H3 1.90 2.75 × 1020 6.40 × 10−4 15, 16
Rb 9/Rk 28 C3H + e → 3CH2 + C2H4 3.64 1.05 × 1016 2.45 × 10−8 18
Rb 10/Rm 9 C3H + e → 3CH2 + C2H6 5.46 7.76 × 1019 1.81 × 10−4 15
NH
Rc 1 H + N + M → NH + M 2.26 k0 = 5.00 × 10−32 3.19 × 1018 3.52 × 10−6 15, 19
k∞ = 5.00 × 10−16
kR = 5.00 × 10−16
Fc = 0.40
Rc 2/Rg 21 N(4S) + C2H3 → NH + C2H2 1.23 1.31 × 10−11 1.94 × 1020 2.13 × 10−4 10, 21
Rc 3/Rk 21 N(4S) + C2H5 → NH + C2H4 1.25 7.10 × 10−11 4.17 × 1022 0.046 22
Rc 4 N(2D) + NH3 → NH + NH2 0.59 5.00 × 10−11 1.50 × 1020 1.65 × 10−4 1
Rc 5/Rd 19 N(2D) + CH4 → NH + CH3 0.69 6.47 × 10−14 2.77 × 1022 0.031 1
Rc 6 2 NH2 → NH + NH3 0.38 7.05 × 10−17 3.71 × 1013 4.09 × 10−11 23, 76
Rc 7 NH + e → NH + H 0.45 3.42 × 1018 3.76 × 10−6 24, 25
Rc 8/Ra 9 N2H+ + e → N(4S) + NH 1.04 1.57 × 1020 1.73 × 10−4 7
CH3
Rd 1 H + 3CH2 + M → CH3 + M 2.98 k0 = 2.06 × 10−29 4.61 × 1011 1.08 × 10−12 27, 28, 29
k∞ = 1.76 × 10−9
Rd 2 H2 + CH + M → CH3 + M 2.90 k0 = 1.73 × 10−30 1.98 × 1018 4.61 × 10−6 15, 30
k∞ = 1.13 × 10−10
kR = 6.00 × 10−16
Fc = 0.63
Rd 3/Rk 3 CH + C2H6 → CH3 + C2H4 2.30 3.09 × 10−10 9.04 × 1020 2.11 × 10−3 31, 68
Rd 4 CH + C3H8 → CH3 + C3H6 2.41 9.21 × 10−11 8.10 × 1018 1.89 × 10−6 32, 70
Rd 5 CH + C4H10 → CH3 + C4H8 2.58 2.89 × 10−10 7.20 × 1015 1.68 × 10−9 32, 70
Rd 6/Rg 4 1CH2 + C2H3 → CH3 + C2H2 3.66 3.00 × 10−11 3.23 × 1018 7.53 × 10−6 37
Rd 7/Rk 4 1CH2 + C2H5 → CH3 + C2H4 2.56 1.50 × 10−11 5.09 × 1019 1.19 × 10−4 37
Rd 8 1CH2 + C2H6 → CH3 + C2H5 0.50 2.46 × 10−10 9.25 × 1020 2.16 × 10−3 27, 71
Rd 9 1CH2 + C3H7 → CH3 + C3H6 2.68 1.71 × 10−11 3.13 × 1014 7.29 × 10−10 38
Rd 10/Rg 6 3CH2 + C2H3 → CH3 + C2H2 3.41 3.00 × 10−11 4.22 × 1019 9.84 × 10−5 37
Rd 11/Rk 7 3CH2 + C2H5 → CH3 + C2H4 2.28 3.00 × 10−11 1.31 × 1021 3.06 × 10−3 37
Rd 12 3CH2 + C3H7 → CH3 + C3H6 2.40 3.00 × 10−12 6.89 × 1014 1.61 × 10−9 38
Rd 13 C2H + CH4 → CH3 + C2H2 0.73 4.49 × 10−13 1.62 × 1021 3.79 × 10−3 34
Rd 14 C2H + C2H5 → CH3 + C3H3 1.44 3.00 × 10−11 2.06 × 1019 4.81 × 10−5 37
Rd 15 C2H + CH3CCH → CH3 + C4H2 1.06 1.55 × 10−10 2.57 × 1019 5.99 × 10−5 72, 73
Rd 16/Rh 2 N(4S) + C2H4 → CH3 + HCN 1.62 3.18 × 10−16 9.70 × 1019 2.26 × 10−4 35
Rd 17 N(4S) + C2H5 → CH3 + H2CN 1.34 3.90 × 10−11 2.37 × 1022 0.055 22
Rd 18 N(4S) + CH3CCH → CH3 + CHCN 2.25 8.01 × 10−16 1.89 × 1017 4.40 × 10−7 35
Rd 19/Rc 5 N(2D) + CH4 → CH3 + NH 0.69 6.47 × 10−14 2.77 × 1022 0.065 1
Rd 20 CN + CH4 → CH3 + HCN 0.50 6.37 × 10−14 5.78 × 1019 1.35 × 10−4 41, 69
Rd 21 C2N + CH4 → CH3 + CHCN 0.97 6.00 × 10−14 2.42 × 1019 5.65 × 10−5 60
Rd 22 CH3CN + C2H → CH3 + HC3N 2.09 1.06 × 10−13 1.64 × 1016 3.83 × 10−8 26
Rd 23 C2H + C2H4 → CH3 + C3H 0.40 7.03 × 10−10 4.67 × 1021 0.011 3
Rd 24 N+ + CH4 → CH3 + NH+ 1.43 5.00 × 10−10 1.40 × 1022 0.033 10, 26
Rd 25 HCN+ + CH4 → CH3 + HCNH+ 1.90 1.14 × 10−9 2.26 × 1022 0.053 3
Rd 26 CH + e → CH3 + H 0.50 1.44 × 1020 3.37 × 10−4 25
Rd 27 C2H + e → CH3 + C 1.19 1.33 × 1019 3.10 × 10−5 11
Rd 28 C2H + e → CH3 + CH 0.42 2.33 × 1020 5.45 × 10−5 12
Rd 29/Rb 5 C2H + e → CH3 + 3CH2 1.89 1.43 × 1022 0.034 13, 14
Rd 30 C2H + e → 2 CH3 3.40 1.20 × 1013 2.81 × 10−11 15, 16
Rd 31/Re 21 C2H + e → CH3 + CH4 4.20 2.38 × 1020 5.56 × 10−4 15
Rd 32/Rg 23 C3H + e → CH3 + C2H2 4.43 6.41 × 1020 1.50 × 10−3 15, 16
Rd 33/Ri 6 C3H + e → CH3 + C2H3 3.69 1.07 × 1015 2.50 × 10−9 18
Rd 34/Rk 29 C3H + e → CH3 + C2H4 5.41 3.03 × 1020 7.06 × 10−4 12
Rd 35/Rl 7 C3H + e → CH3 + C2H5 5.31 7.46 × 1019 1.74 × 10−4 18
Rd 36/Rm 10 C3H + e → CH3 + C2H6 5.34 3.07 × 1019 7.17 × 10−5 15
Rd 37/Rf 2 CH3NH + e → CH3 + NH3 2.92 2.60 × 1020 6.08 × 10−4 15, 42
CH4
Re 1 H + CH3 + M → CH4 + M 2.87 k0 = 1.62 × 10−28 1.36 × 1018 3.17 × 10−6 33, 77
k∞ = 2.95 × 10−10
kR = 1.80 × 10−16
Fc = 0.56
Re 2/Rg 7 CH3 + C2H3 → CH4 + C2H2 1.88 1.95 × 10−10 3.44 × 1021 8.03 × 10−3 45, 78
Re 3/Rk 9 CH3 + C2H5 → CH4 + C2H4 1.92 6.87 × 10−12 4.88 × 1021 0.011 15, 26
Re 4 CH3 + C3H5 → CH4 + CH2CCH2 1.49 1.56 × 10−12 1.53 × 1020 3.57 × 10−4 39
Re 5 CH3 + C3H6 → CH4 + C3H5 0.53 4.85 × 10−26 2.86 × 104 6.67 × 10−20 36
Re 6 CH3 + C3H7 → CH4 + C3H6 2.19 1.00 × 10−11 3.90 × 1016 9.11 × 10−8 15, 38
Re 7/Ra 2 CH3 + NH → CH4 + N(4S) 0.59 1.00 × 10−11 3.88 × 1022 0.091 20
Re 8 CH + C2H6 → CH4 + C2H 1.22 1.43 × 10−9 5.35 × 1020 1.25 × 10−3 3
Re 9 CH + C2H2 → CH4 + C2H 0.67 1.44 × 10−9 2.04 × 1021 4.77 × 10−3 3
Re 10 CH + C2H4 → CH4 + C2H 1.28 1.70 × 10−9 4.17 × 1021 9.73 × 10−3 3
Re 11 CH + C2H2 → CH4 + C2H 0.57 1.48 × 10−9 2.50 × 1022 0.058 3
Re 12 CH + C2H4 → CH4 + C2H 0.84 1.50 × 10−9 3.86 × 1022 0.090 3
Re 13 CH + HCN → CH4 + HCNH+ 1.10 5.80 × 10−9 1.30 × 1023 0.304 15
Re 14 C2H + C2H2 → CH4 + c-C3H 0.96 6.84 × 10−11 1.50 × 1021 3.51 × 10−3 3
Re 15 C2H + C2H4 → CH4 + C3H 0.63 3.55 × 10−10 7.83 × 1021 0.018 3
Re 16 N+ + C2H6 → CH4 + HCNH+ 6.10 1.60 × 10−10 7.20 × 1018 1.68 × 10−5 10
Re 17 CH + e → CH4 + H 0.49 3.11 × 1021 7.26 × 10−3 50, 51
Re 18 C2H + e → CH4 + C 1.92 3.03 × 1020 7.07 × 10−4 12
Re 19 C2H + e → CH4 + CH 1.79 6.73 × 1021 0.016 13, 14
Re 20/Rb 6 C2H + e → CH4 + 3CH2 3.48 6.17 × 1012 1.44 × 10−11 15, 16
Re 21/Rd 31 C2H + e → CH4 + CH3 3.94 2.25 × 1020 5.25 × 10−4 15
Re 22 C3H + e → CH4 + C2 2.28 1.97 × 1018 4.60 × 10−6 17
Re 23 C3H + e → CH4 + C2H 3.46 4.83 × 1020 1.13 × 10−3 15, 16
NH3
Rf 1 NH2 + H + M → NH3 +M 1.78 k0 = 2.52 × 10−28 6.11 × 1015 6.73 × 10−9 15, 54, 64
k∞ = 2.84 × 10−10
kR = 2.82 × 10−16
Fc = 0.42
Rf 2/Rd 37 CH3NH + e → NH3 + CH3 2.58 2.25 × 1020 2.48 × 10−4 15, 42
C2H2
Rg 1 H + C2H + M → C2H2 +M 2.99 k0 = 9.00 × 10−26 1.66 × 1015 7.74 × 10−9 37, 79
k∞ = 1.85 × 10−10
kR = 1.00 × 10−13
Fc = 0.40
Rg 2 H + C6H5 → C2H2 + C4H4 2.03 6.08 × 10−12 1.65 × 1015 7.68 × 10−9 65
Rg 3 1CH2 + C2H → C2H2 + CH 1.03 3.00 × 10−11 3.19 × 1018 1.49 × 10−5 37
Rg 4/Rd 6 1CH2 + C2H3 → C2H2 + CH3 2.11 3.00 × 10−11 1.34 × 1018 6.27 × 10−6 37
Rg 5 3CH2 + C2H → C2H2 + CH 0.90 3.00 × 10−11 4.11 × 1019 1.92 × 10−4 37
Rg 6/Rd 10 3CH2 + C2H3 → C2H2 + CH3 1.97 3.00 × 10−11 1.78 × 1019 8.30 × 10−5 37
Rg 7/Re 2 CH3 + C2H3 → C2H2 + CH4 1.16 1.95 × 10−10 1.51 × 1021 7.09 × 10−3 45, 78
Rg 8 C2H + C2H3 → 2 C2H2 2.13 1.60 × 10−12 3.67 × 1016 1.71 × 10−7 37
Rg 9/Rk 10 C2H + C2H5 → C2H2 + C2H4 2.19 3.00 × 10−12 1.40 × 1018 6.55 × 10−6 37
Rg 10/Rl 4 C2H + C2H6 → C2H2 + C2H5 0.73 4.15 × 10−11 1.37 × 1019 6.37 × 10−5 34, 52
Rg 11 C2H + CH2CCH2 → C2H2 + C3H3 1.16 2.58 × 10−10 2.88 × 1019 1.34 × 10−4 60
Rg 12 C2H + C3H5 → C2H2 + CH2CCH2 2.00 1.20 × 10−11 8.15 × 1017 3.80 × 10−6 39
Rg 13 C2H + C3H7 → C2H2 + C3H6 2.61 1.00 × 10−11 2.71 × 1013 1.27 × 10−11 38
Rg 14 C2H + C3H8 → C2H2 + C3H7 0.93 6.10 × 10−11 5.73 × 1016 2.67 × 10−7 34, 52
Rg 15 C2H + C4H1 0 → C2H2 + C4H9 0.88 1.15 × 10−10 1.51 × 1013 7.07 × 10−11 53, 75
Rg 16/Rk 11 2 C2H3 → C2H2 + C2H4 1.72 3.50 × 10−11 9.72 × 1016 4.53 × 10−7 66
Rg 17/Rm 3 C2H3 + C2H5 → C2H2 + C2H6 1.76 8.00 × 10−13 8.96 × 1016 4.18 × 10−7 37
Rg 18 C2H3 + C3H3 → C2H2 + CH3CCH 1.44 8.00 × 10−12 3.09 × 1016 1.44 × 10−7 27, 44
Rg 19 C2H3 + C3H5 → C2H2 + C3H6 1.43 8.00 × 10−12 1.17 × 1017 5.44 × 10−7 39
Rg 20 C2H3 + C3H7 → C2H2 + C3H8 1.73 2.00 × 10−12 1.03 × 1012 4.79 × 10−12 38
Rg 21/Rc 2 N(4S) + C2H3 → C2H2 + NH 0.71 1.31 × 10−11 7.88 × 1019 3.68 × 10−4 10, 21
Rg 22/Rb 7 C3H + e → C2H2 + 3CH2 2.09 1.37 × 1019 6.40 × 10−5 17
Rg 23/Rd 32 C3H + e → C2H2 + CH3 2.56 1.71 × 1020 8.00 × 10−4 15, 16
HCN
Rh 1 H + CN + M → HCN +M 2.74 k0 = 8.78 × 10−31 3.94 × 1016 4.33 × 10−8∕9.19 × 10−8 40
k∞ = 2.44 × 10−10
kR = 1.00 × 10−13
Fc = 0.40
Rh 2/Rd 16 N(4S) + C2H4 → HCN + CH3 0.90 3.18 × 10−16 1.62 × 1018 1.78 × 10−6∕3.78 × 10−5 35
Rh 3 CN + C3H8 → HCN + C3H7 0.67 1.18 × 10−10 9.91 × 1015 1.09 × 10−8∕2.31 × 10−9 46, 74
Rh 4 CN + CH2NH → HCN + H2CN 0.76 2.80 × 10−11 3.30 × 1017 3.62 × 10−7∕7.70 × 10−7 55, 75
Rh 5 CH + HC3N → HCN + c-C3H 1.45 1.43 × 10−9 2.53 × 1017 2.79 × 10−7∕5.91 × 10−7 3
Rh 6 CN+ + CH4 → HCN + CH 1.83 5.00 × 10−10 3.51 × 1018 3.86 × 10−6∕8.19 × 10−6 3
Rh 7 HCN+ + C2H2 → HCN + C2H 1.07 1.15 × 10−9 1.37 × 1019 1.51 × 10−5∕3.20 × 10−5 3
Rh 8 CNC+ + C2H4 → HCN + c-C3H 2.86 1.95 × 10−10 1.07 × 1018 1.18 × 10−6∕2.50 × 10−6 43
Rh 9 HCNH+ + C3H3N → HCN + C3H4N+ 1.14 4.50 × 10−9 2.02 × 1018 2.22 × 10−6∕4.70 × 10−6 56, 57
C2H3
Ri 1 H + C2H2 + M → C2H3 +M 0.77 k0 = 5.88 × 10−30 3.79 × 1013 1.77 × 10−10 32, 77
k∞ = 3.74 × 10−15
kR = 2.16 × 10−18
Fc = 0.18
Ri 2/Rk 5 1CH2 + C3H5 → C2H3 + C2H4 1.25 6.67 × 10−11 1.34 × 1019 6.07 × 10−5 39
Ri 3 C2H3CN + C2 → C2H3 + C3N 1.62 4.4 × 10−10 3.53 × 1015 1.65 × 10−8 49, 59
Ri 4 C3H + e → C2H3 + CH 2.09 4.51 × 1018 2.10 × 10−5 17
Ri 5/Rb 8 C3H + e → C2H3 + 3CH2 0.99 8.31 × 1019 3.37 × 10−4 15, 16
Ri 6/Rd 33 C3H + e → C2H3 + CH3 2.05 4.70 × 1014 1.92 × 10−8 18
Ri 7/Rm 11 C4H + e → C2H3 + C2H6 3.69 8.15 × 1018 3.81 × 10−5 18, 48
N2
Rj 1 2 N(4S) + M → N2 + M 4.91 k0 = 4.46 × 10−32 4.63 × 1019 1.02 × 10−4 58
k∞ = 5.00 × 10−16
kR = 5.00 × 10−16
Fc = 0.40
Rj 2/Ra 1 N(2D) + N2 → N2 + N(4S) 0.79 1.70 × 10−14 2.53 × 1022 0.056 1
Rj 3 N+ + HCN → N2 + CH+ 1.28 1.29 × 10−9 1.11 × 1020 2.43 × 10−4 3
Rj 4 N + C2H2 → N2 + C2H 2.02 9.40 × 10−10 1.93 × 1021 4.26 × 10−3 10
Rj 5 N + HCN → N2 + HCN+ 0.99 3.90 × 10−10 4.31 × 1020 9.48 × 10−4 3
Rj 6 N2H+ + HCN → N2 + HCNH+ 1.16 3.20 × 10−9 4.48 × 1020 9.86 × 10−4 3
C2H4
Rk 1 H + C2H3 + M → C2H4 +M 2.40 k0 = 8.54 × 10−27 1.51 × 1012 7.08 × 10−12 47
k∞ = 1.76 × 10−10
Rk 2 C + CH4 + M → C2H4 + M 3.06 2.00 × 10−15 4.37 × 1019 2.04 × 10−4 67
Rk 3/Rd 3 CH + C2H6 → C2H4 + CH3 1.23 3.09 × 10−10 4.13 × 1020 1.93 × 10−3 31, 68
Rk 4/Rd 7 1CH2 + C2H5 → C2H4 + CH3 1.37 1.50 × 10−11 2.41 × 1019 1.13 × 10−4 37
Rk 5/Ri 2 1CH2 + C3H5 → C2H4 + C2H3 1.21 6.67 × 10−11 1.30 × 1019 6.26 × 10−5 39
Rk 6/Rl 2 1CH2 + C3H7 → C2H4 + C2H5 1.82 4.29 × 10−11 4.26 × 1014 1.99 × 10−9 38
Rk 7/Rd 11 3CH2 + C2H5 → C2H4 + CH3 1.22 3.00 × 10−11 5.99 × 1020 2.79 × 10−3 37
Rk 8/Rl 3 3CH2 + C3H7 → C2H4 + C2H5 1.62 3.00 × 10−12 3.48 × 1014 1.62 × 10−9 38
Rk 9/Re 3 CH3 + C2H5 → C2H4 + CH4 1.10 6.87 × 10−12 2.27 × 1021 0.011 15, 26
Rk 10/Rg 9 C2H + C2H5 → C2H4 + C2H2 2.03 3.00 × 10−12 2.09 × 1018 9.74 × 10−6 37
Rk 11/Rg 16 C2H3 + C2H3 → C2H4 + C2H2 1.60 3.50 × 10−11 1.27 × 1017 5.91 × 10−7 66
Rk 12 C2H3 + C2H5 → 2 C2H4 1.64 1.50 × 10−11 2.40 × 1017 2.10 × 10−5 66
Rk 13 C2H3 + C3H5 → C2H4 + CH2CCH2 1.39 4.00 × 10−12 8.05 × 1016 3.76 × 10−7 39
Rk 14 C2H3 + C3H7 → C2H4 + C3H6 1.97 2.00 × 10−12 2.31 × 1012 1.08 × 10−11 38
Rk 15 C2H3 + C4H3 → C2H4 + C4H2 2.07 1.75 × 10−12 1.15 × 1015 5.38 × 10−9 27
Rk 16/Rm 4 2 C2H5 → C2H4 + C2H6 1.44 2.40 × 10−12 1.24 × 1019 5.81 × 10−5 33
Rk 17 C2H5 + C3H3 → C2H4 + CH3CCH 1.37 6.68 × 10−12 1.39 × 1018 6.48 × 10−6 37, 44
Rk 18 C2H5 + C3H5 → C2H4 + C3H6 1.36 6.68 × 10−12 5.27 × 1018 2.46 × 10−5 34
Rk 19 C2H5 + C3H7 → C2H4 + C3H8 1.67 5.00 × 10−11 6.37 × 1013 7.82 × 10−9 15, 38
Rk 20 C2H5 + C4H3 → C2H4 + C4H4 2.13 8.00 × 10−13 4.50 × 108 2.10 × 10−15 27
Rk 21/Rc 3 N(4S) + C2H5 → C2H4 + NH 0.67 7.10 × 10−11 1.87 × 1015 8.73 × 10−9 22
Rk 22 C2H + NH3 → C2H4 + NH 0.89 2.09 × 10−9 4.22 × 1019 1.97 × 10−4 43
Rk 23 C2H + CH2NH → C2H4 + CH2NH 1.03 2.57 × 10−9 5.40 × 1020 2.52 × 10−3 61
Rk 24 C2H + CH3CN → C2H4 + CH4CN+ 1.58 3.80 × 10−9 3.64 × 1020 1.70 × 10−3 3
Rk 25 C2H + HC3N → C2H4 + HC3NH+ 0.75 3.55 × 10−9 7.39 × 1018 3.45 × 10−5 3
Rk 26 C2H + C3H3N → C2H4 + C3H3NH+ 1.51 5.80 × 10−9 2.35 × 1019 1.10 × 10−4 15
Rk 27 C2H + C3H5N → C2H4 + C3H5NH+ 1.10 6.00 × 10−9 2.10 × 1016 9.81 × 10−8 15
Rk 28/Rb 9 C3H + e → C2H4 + 3CH2 1.82 3.81 × 1015 1.78 × 10−8 18
Rk 29/Rd 34 C3H + e → C2H4 + CH3 2.90 1.56 × 1020 7.27 × 10−4 12
C2H5
Rl 1 H + C2H4 + M → C2H5 + M 0.77 k0 = 1.64 × 10−28 2.85 × 1016 1.33 × 10−7 34, 77
k∞ = 4.85 × 10−14
kR = 5.62 × 10−17
Fc = 0.20
Rl 2/Rk 6 1CH2 + C3H7 → C2H5 + C2H4 1.76 4.29 × 10−11 2.40 × 1014 1.12 × 10−9 38
Rl 3/Rk 8 3CH2 + C3H7 → C2H5 + C2H4 1.56 3.00 × 10−12 2.00 × 1014 9.33 × 10−10 38
Rl 4/Rg 11 C2H + C2H6 → C2H2 + C2H5 0.65 4.15 × 10−11 1.68 × 1019 1.51 × 10−6 52
Rl 5 C2H + C3H7 → C2H5 + C3H3 1.22 2.00 × 10−11 2.00 × 1013 9.32 × 10−11 38
Rl 6 C3H + e → C2H5 + CH 0.91 3.34 × 1018 1.56 × 10−5 18
Rl 7/Rd 35 C3H + e → C2H5 + CH3 2.75 1.58 × 1019 7.38 × 10−5 18
C2H6
Rm 1 H + C2H5 + M → C2H6 + M 2.09 k0 = 2.38 × 10−30 4.57 × 109 2.13 × 10−14 62, 63
k∞ = 1.66 × 10−10
Rm 2 2 CH3 + M → C2H6 + M 1.85 k0 = 2.04 × 10−25 6.18 × 1021 0.029 15
k∞ = 7.45 × 10−11
kR = 1.65 × 10−13
Fc = 0.37
Rm 3/Rg 17 C2H3 + C2H5 → C2H6 + C2H2 1.53 8.00 × 10−13 6.76 × 1016 3.16 × 10−7 37
Rm 4/Rk 16 2 C2H5 → C2H6 + C2H4 1.34 2.40 × 10−12 7.08 × 1018 3.30 × 10−5 33
Rm 5 C2H5 + C3H7 → C2H6 + C3H6 1.72 5.00 × 10−11 4.51 × 1013 2.10 × 10−10 15, 38
Rm 6 C2H5 + C4H3 → C2H6 + C4H2 1.74 8.00 × 10−13 7.07 × 1015 3.30 × 10−8 27
Rm 7 C2H + C3H8 → C2H6 + C3H 0.82 5.00 × 10−11 3.02 × 1015 1.41 × 10−8 26
Rm 8 C3H + e → C2H6 + CH 1.17 2.25 × 1020 1.05 × 10−3 20
Rm 9/Rb 10 C3H + e → C2H6 + 3CH2 2.55 6.65 × 1018 3.10 × 10−5 15
Rm 10/Rd 36 C3H + e → C2H6 + CH3 2.67 8.19 × 1018 3.82 × 10−5 15
Rm 11/Ri 7 C4H + e → C2H6 + C2H3 3.32 2.20 × 1018 1.03 × 10−5 18, 48

Notes. ΔE is the kinetic energy release, k is the reaction coefficient, Te is the electron temperature, Φesc is the escape rate of a neutral species via a certain chemical channel, is the corresponding fractional contribution to total C or total N escape. When not stated explicitly, all rate coefficients refer to a neutral temperature of 150 K. For three-body reactions, several parameters are provided, which could be used to obtain the appropriate rate coefficients with the aid of Eqs. (1) and (2) in Sect. 2.

References. (1) Herron (1999), (2) Cravens et al. (1997), (3) McEwan & Anicich (2007), (4) Sheehan & St. -Maurice (2004), (5)Peterson et al. (1998), (6)Le Padellec et al. (1999), (7)Wakelam et al. (2015), (8)Husain & Young (1975), (9)Harding et al. (1993), (10)Dutuit et al. (2013), (11)Kalhori et al. (2002), (12)Ehlerding et al. (2004), (13)McLain et al. (2004), (14)Geppert et al. (2004a), (15)Vuitton et al. (2019), (16)Janev & Reiter (2004), (17)Geppert et al. (2004b), (18)Angelova et al. (2004), (19)Brown (1973), (20) De La Haye et al. (2007), (21) Payne et al. (1996), (22) Stief et al. (1995), (23) Xu et al. (1998), (24) Mitchell (1990), (25) Thomas et al. (2005), (26) Zhu et al. (2004), (27) Lavvas et al. (2008a), (28) Laufer et al. (1983), (29) Fulle & Hippler (1997), (30) Brownsword et al. (1997), (31) Canosa et al. (1997), (32) Baulch et al. (1992), (33) Baulch et al. (1994), (34) Baulch et al. (2005), (35) Kerr & Parsonage (1972), (36) Kinsman & Roscoe (1994), (37) Tsang & Hampson (1986), (38) Tsang (1988), (39) Tsang (1991), (40) Tsang (1992), (41) Sims et al. (1993), (42) Adams et al. (1988), (43) Anicich (1993), (44) Vuitton et al. (2006a), (45) Fahr et al. (1991), (46) Hess et al. (1989), (47) Monks et al. (1995), (48) Larsson et al. (2005), (49) Jamieson et al. (1970), (50) Kamińska et al. (2010), (51) Semaniak et al. (1998), (52) Murphy et al. (2003), (53) Hoobler et al. (1997), (54) Zetzsch & Stuhl (1981), (55) Chang & Wang (1995), (56) Petrie et al. (1991), (57) Petrie et al. (1992), (58) Clyne & Stedman (1967), (59) Reisler et al. (1980), (60) Hoobler & Leone (1997), (61) Edwards et al. (2008), (62) Teng & Jones (1972), (63) Sillesen et al. (1993), (64) Mantei & Bair (1968), (65) Wang & Frenklach (1994), (66) Laufer & Fahr (2004), (67) Husain & Kirsch (1971), (68) McKee et al. (2003), (69) Gannon et al. (2007), (70) Loison et al. (2006), (71) Wagener (1990), (72) Carty et al. (2001), (73) Goulay et al. (2007), (74) Yang et al. (1992), (75) Nizamov & Leone (2004), (76) Klippenstein et al. (2009), (77)Vuitton et al. (2012), (78)Stoliarov et al. (2000), (79)Harding et al. (2005).

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.